[@SoleAccord] I'm glad you noticed that about the morality of this story. That was very much on purpose. I did say from the beginning that this was to be a more mature Power Rangers than your normal fare. I'll go ahead and answer all your questions in the order provided  

1) This will take place in multiple cities and colonies across the planet. The team will be doing what it can to incite uprising wherever possible. [i]They will not always win.[/I]

2) Both. Some people will be inspired, others will believe in Galatec's smear campaign. Sometimes the team may have to go out of their way to avoid civilian conflict. 

3) Yes, merchandise for past teams can exist, though Galatec will remove it if found. 

4) Power Rangers are remembered in the same way we would remember George Washington or Ghengis Kahn. History that happened a long time ago nobody has any relation to anymore. They are more legends or myths, and the more hopeful and independent slaves believe that the heroes of legend will show up once again to free them. 

5) Yes. In fact I would say it's even likely. 

6) Special training is allowed for certain slaves that show above and beyond loyalty and work ethic. To most commoners, no. To certain ones they trust, yes. 

Additionally, the additives, special lighting, and other brainwashing methods employed by Galatec are not 100%. Approximately.5% of the population are, for one reason or another, immune. That's the portion of society our rangers come from.